pinctrl: mediatek: common-v1: Fix error checking in mtk_eint_init()

The devm_kzalloc() function doesn't return error pointers, it returns
NULL on error.  Then on the next line it checks the same pointer again
by mistake, "->base" instead of "->base[0]".

Fixes: fe412e3 ("pinctrl: mediatek: common-v1: Fix EINT breakage on older controllers")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/aAijc10fHka1WAMX@stanley.mountain
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Dan Carpenter

drivers/pinctrl/mediatek/pinctrl-mtk-common.c

@@ -1018,12 +1018,12 @@ static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev)
 	pctl->eint->nbase = 1;
 	/* mtk-eint expects an array */
 	pctl->eint->base = devm_kzalloc(pctl->dev, sizeof(pctl->eint->base), GFP_KERNEL);
-	if (IS_ERR(pctl->eint->base))
+	if (!pctl->eint->base)
 		return -ENOMEM;
 
 	pctl->eint->base[0] = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(pctl->eint->base))
-		return PTR_ERR(pctl->eint->base);
+	if (IS_ERR(pctl->eint->base[0]))
+		return PTR_ERR(pctl->eint->base[0]);
 
 	pctl->eint->irq = irq_of_parse_and_map(np, 0);
 	if (!pctl->eint->irq)